Talk:Versine

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I think Haversine should redirect to Haversine_formula rather than here.

It is really always non-negative, as stated in the "History and applications" section, if it is defined as 2sin²(θ/2), but not, if it is defined as 1-cosθ. Are the definitions missing a pair of || somewhere? --Pt 23:33, 6 Oct 2004 (UTC)

Sorry, my fault. --Pt 15:39, 7 Oct 2004 (UTC)

• Would it make sense to have a vertangent or versecant function? Or an exsine or extangent function? —Preceding unsigned comment added by Celtic Minstrel (talk • contribs) 22:53, 18 October 2007 (UTC)